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2
x  1
2
8
x  0
3
1
x  6
4
1
x  5
5
0
x  7
6
2
x  0
7
8
x  1
8
0
x  1
9
9
x  0
10
4
x  1
11
0
x  6
12
9
x  1
13
0
x  4
14
0
x  3
15
0
x  5
16
3
x  1
17
1
x  1
18
1
x  7

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